Plaster-mixing device



N. ESSICK PLASTER MIXING DEVICE Filed Sept. 21. 1925 IN V EN TOR.

v /1/6/4//770I7 56/04 BY 7% 4 A TTORNEYS.

" ing requires cutting and hoein-g of the batch Patented May 31, 1927. .a

liTEWMAN- ass 16K or. nos ANGEIILEVS amber-1 Application filed lsepternber 21, 1925 SeriaLN'O. 57,653.

This invention relates to a device adapted to mix plaster-and like cementitious ingrew f clients, and it is especially useful wherein the plastic material is of a viscous-nature. Heretofore, mixers have :been provided which are efficient with cementitious' ingreclients which" are granular, ,butfnot equally so with viscous ingredients. The efficient mixing action for granular ingredients such as cement and concretefis that'of shoveling or turning over the mix. Mort-ar, plaster, and like plastic material for eflicient mixor charge. I e I The primary object of the present invention is to provide a mixer wherein the entire batch or charge of material is hoed, cut, beaten, and whipped,'during the mixing operation, In addition to the broader objects of this invention details of structure.

These objectstogeth'er with other objects and cor-respondingaccomplishments are obtainedbymeans o'f'the embodiment of my there are certain invention illustrated in the accompanying drawing,in which: I v

Flg. 1 is an elevatlon of a beater, 1ts position as assembled with its drum being 111- dicated in -dotted lines; Fig. 2 is a section as seen on the line 2+2 of Fig.1; and F ig.

u is an elevation" of the drum and nixer assembled.

' cured theretoare diametrically opposed. arms 10 and 11. Secured 'tothe shaft and to arm 11. Secured to. arms.- Sand 10 are blades 13, 14,-and 15. Blades 13, 14 a1id15 extend'longitudinally of the shaft, are spaced fromone another and extend Referring more particularly'to the drawing, 5 indicates a drum open'at 'theflupper, side in which the 1ngred1ents aremlxed.

Extending through the end head of the drum and ,journalled therein is the heater" 7 shaft 6 The drum-and shaftare supported in bearing standards 7 which may be se-' cured to a suitable base'or frame, the drum.

being suspended on the shaft.

Secured to the beater shaft adjacent one. of the heads is an arm 8.; The arm maybe secured to the shaft bya split collar 9, and a the outer end thereof is turned through an angle. At the center of, the .shaft and seadjacent the other head is anarm 12 similar toyarm 8 but diametrically opposedthereto. Arm 10 is disposed atanangle of 90? toarm 8, and arm lQ-isdisposed at in a like manner.

close to theperipherall'wall of I A Each blade is" bent so as -to 'follo w. 'substan; tially a helical path around the shaft, The

shaft is-intendedflto turn the beater in thej O I direction of the "arrow A in -Fig.2. This} would cause the ingredients to slidei ina wardly along the blade toward theinterme 1 of the blades are scooped slightly to'impede.

diate portion-of the drum; The innerreiids the free inward movementof the material 1 p along the blades. Blades 16, 17, and 18 are secured to arms 1l ,and'12, being arranged to vextend in the opposite direction to blades 13, 14, and 15, butotherwise are arranged The ends of. the blades.

16, 17, and 18 are scooped. The construetion is suchfthat blades16, 17, and 18 tend" (v to move the plastic material toward thein termediate portion of the drum. It will be noted thatin the revolution of the beater, the entire volume of. the charge beaten.

tively narrow blades and is moved longitudinally' of the drum. There is a heating or whippingof the entire plastic batch,-the blades passing close to the walls of the drum. i What I claim is:'.

or batch within the drum is stirrednand I The plaster is not merely turned} over and, stirred, but it is cut by. therelae 1. In a plaster mixer, the combination ofz cured tdsaidshaft and comprisingfhelicali blades secured to and extending along said a cylindrical mixing chamber, a shaft jourv V 'naled in sa d chamber, a beater elementse 9 shaft,said blades being closely spaced ra-,

dially and lying in a common plane throughout their length, the blades being scooped at one end.

*2. In aplastermiXer, the combinationof a cylindrical mixing chambeda shaft jour v o naled in said chamber, :a beater element. se-'- cured at oneend of 'said shaft andcomjprismg radially extending rods spaced alongsaid shaft and arranged at varying angles rods, said-blades beingclosely spaced" along said rods whereby'they will'sweep'substane chamber and a second beater-element having T its blades helixed reversely 'tothe blades of 1 a r the first beater. element, said second beater 1 element being adapted to sweep substantially the'entireradiusof that end of the tially the entire'radius of the'remainderof I the chamber, the adjacent ends of the blades], of the respective elementsbeing scooped. 1

. and helical blades extending between said i a cylindricallmixing 'chamber shaft joinnaled in saidichamber, a beater elementcom- F prising spiral blades securedfto sai d shaft, 7 r a second beater elliient,"comfi jging'bh sg, a 5 spii aled reversely to the"bladegpfjhe fiysb Q -name d beat erfelemeiit, the adj ac'ent ends of 

